OK... I didn't see the option for Shield Bash in Arms Law. So many rulebooks.. and Companions!
Anyway... my interpretation...
- shield bash on the ram/butt/bash table (max of medium for wall shield or small for others)
- cost as per 1HC
- still allow the shield DB to apply
- shield is an off-hand attack (-20 OB)
- attack with either normal weapon or shield or both
- parry decreases OB from both weapons (and doesn't stack)
Thanks for the input guys